机械设备外壳挤压态新型镁合金的组织与性能研究

Research on Microstructure and Properties of New Squeezed Magnesium Alloy for Mechanical Equipment Shell

采用连续挤压工艺制备了机械设备外壳用挤压态新型镁合金Mg-8Al-1Zn-0.15In-0.15Ti。对该镁合金进行了显微组织、XRD、力学性能和阻尼性能分析。结果表明:该合金由α-Mg基体和少量的Mg_(17)Al_(12)相组成,具有较佳的力学性能和阻尼性能。该合金的抗拉强度为327 MPa、屈服强度为268 MPa、断后伸长率为25%。与商业AZ31镁合金相比,在0.8Hz频率下该新型合金在25℃的阻尼性能增加了196%。

The new squeezed magnesium alloy Mg-9Al-1Zn-0.15In-0.15Ti for mechanical equipment shell was prepared by continuous extrusion process, and the microstructure, XRD, mechanical property and damping capacity of the alloy were analyzed. The results show that the new alloy is composed of α-Mg matrix and a little Mg17Al12 phase, which has good mechanical property and damping capacity. The tensile strength of the alloy is 327 MPa, the yield strength is 268 MPa and the elongation is 25%. Compared with commercial AZ31 magnesium alloy, the damping capacity of the new alloy increases by 196% at the temperature of 25℃ and the frequency of 0.8 Hz.